Question

tính bằng cách thuận tiện 

111/110 * 112/111 * 113/112 * 114/113 * 55/57 

giúp mk nha mk đg cần gấp thạnk you 

Answer 1

1

Answer 2

\(=\dfrac{1}{110}\times\dfrac{1}{1}\times\dfrac{1}{1}\times\dfrac{114}{1}\times\dfrac{55}{57}\\ =\dfrac{114\times55}{110\times57}\\ =\dfrac{2\times1}{2\times1}=\dfrac{2}{2}=1\)

Answer 3

\(\dfrac{111}{110}\times\dfrac{112}{111}\times\dfrac{113}{112}\times\dfrac{114}{113}\times\dfrac{55}{57}=\dfrac{111\times112\times113\times114}{110\times111\times112\times113}\times\dfrac{55}{57}\)

                                                   \(=\dfrac{114}{110}\times\dfrac{55}{57}=\dfrac{57}{55}\times\dfrac{55}{57}=1\)

Answer 4

   \(\dfrac{111}{110}\times\dfrac{112}{111}\times\dfrac{113}{112}\times\dfrac{114}{113}\times\dfrac{55}{57}\)

 

\(=\dfrac{111\times112\times113\times114\times55}{110\times111\times112\times113\times57}\)

 

\(=\dfrac{114\times55}{110\times57}\)

 

\(=\dfrac{57\times2\times55}{55\times2\times57}\)

 

\(=1\)

Answer 5

1